Self-lubricating shaft.



. To all luihom it may concern:

UNITED s'rariis PATENT orrion.

EDWARD L. WOOD, OF LONG ISLAND CITY, NEW YORK. 1 a

SELF- LUBRICATING SHAFT.

Be it known that I, EDWARD L. 7001), a

citizen of the United States, residing in Long flfhisfhas been .before proposed but I vhave -made improvements which are radical and I provide 'convenient and re.

important. liable meansof. insuring a slow discharge under'all "conditions, with an increased rate'of discharge ivhenthe shaft is revolved.

- The invention is particularly useful for a loose pulley, revolving" alongside of -a fast pulley and I will describe it as thus applied.

"I 'malte the sliaft, or that portion of it.

which constitutes' lthe 4 bearing for the loose pulley, a heavy drawn tube, for which the material is preferablyfa moderately high carnotched.

"nary lubricant., lubricating oil.

I tap into t-he main tube 'a pair of small tubes reachingin opposite directions nearlyy bon steel, say, 70 hundredths of one per cent..

carbon.V The endsai'etightly secured.v An

aperture in one side is closed by atightfitfting screwwhich being 'easily removed, affords means' to supply additional lubricant freni time to time; I canv employ any ordiacross the interior. The innerend ofeachis Before introducing these tubes 'into their places, I insert jin each a hard braided cord which isfli'ttle longer than'the' di'ameterof the sliaft,:and' serves as a slow 4r() I I acting wicln i vconsider the best means of carrying out the invention.` Y j 'I h'e accompanying drawings form a p art of this specification. 'i

Figure 1 isa central longitudinal section, and Fig.. 2 is a transverse section 'on the line 2--2 in Fig'. 1, ona larger scale. v

Similar letters vof rcfcrciicc indicate like' parts in all the figures where they appear.- .A is a-tubeivliich constitutes the shaft and M is the center portion of a loose pulley.

The tubularshaftis polished to presentthe-v pi'opcr' surface to run in bearings 'm :show-'nas in the center of the loose pulley, or my self- Specification of Letters Patent.

Application meinung i4, i997.' semi No. 378,912.

difficulty in lubricating,` shaftingv I prefer` ordinary limpid' Patented sepas, ieo'af lubricating shaft maybe stationary and. al-

velocity around it. Myv shaft ivill serve ivell in either condition, but it is ofinost advantage'ivhenrunning as'iirst'suggested, because then centrifugal force 'is developedin the shaft itself. My invention has noeffect on 'and uniform bearing o n the shaft.

B is an axial screw-plug ivhich serves' as a tight stop Ior seal. The screwfthreads hold these parts together very, firmly. C is a screiv-plugat the oppositeend.

D is a lateral screw-plugr having the under face of its head nicely finished and matched into a-corresponding seat. A proper recess screw in which to engage-,a key to forcibly out interfering with the vapplication of a uliiiay be subjected; E E areivic-k tubes. ments used soft steel say, 10 to 2() hundredths and brass for these Wick tubes. Ihelat-ter carry each a. tightly fittingr Wick G which is alittle longer than'the Wick tube.v Thesurtends out in a notch e into the. interior-of the `tube A.

shaft so as to exude at the other end of the wick tube, exceptvery sloivly. 'Tlie'followin'g is adescription of what I f When .the shaft is'standing still, there is 4very littlel escape vof oil, because-when the arrangement presents'the inner end doivnto prevent'its escape.

-lVlien the invention is employed in situations ivhere it is4 subjected to long periods of rest,l itlis preferredy to fill it full. I

-alongside of the loose pulley i\[.= I make a wide and shallow key seat" in 'thepulley' P and employ a liey N of corresponding Width; Beforeputting the parts together I flattcnby hand or by machinery, a'sufficient surfaced should besiuik to-a sufficient',depthinthis 1 turn'to insert or removetlie screwplug', `Withley, or with any 'other use to `which they sia-ft I'have in my eXperi-' of one percent. carbon'for the main tube'A- force tends to prevent' its moving across the ivard toreceive oil, the outer end is up so `as.

P is a fixed pulley keyed on the'shaftAi low the loose pulley to run at any desired 'the pulley beyond affording'a'I Ajust sufficient plus Wick G1 is bent at right angles. and ex'- The 'centrifugal force is neutralized when the shaft is running at high velocity because the Wick' tubes beingsimilar andinserted in only about quarter iio soaz? on the exterior of my tube A and form the i bearings of varioussizes and forvariouspuradjacentface of the key N to match. This key is vdriven in and removed with the same general effect as an ordinary key and itkholds the pulley firmly. The arrangement keys the pulley on the thin hollow shaft without materially weakening the construction.

Modifications may be madev wit-hout departing from the principle or sacrificing the advantages vof the invention.v I can make l the whole length of the shaft hollow, and in some situationssuch would be desirable, for the reason amongothers, that it wou/ld serve for a longer period without replenishing. The proportions may be yaried with regard to the thickness ofthe part A." I can use ordinary tubing, or from that to avery heavy tube. I can have -merely a small passage along the axis of the tube. The tubes Emay be of such length as to extend quite across the interior of the hollow shaft but I refer to make them of such lengththat then` free ends are about one quarter inch within the interior. y'Ihe wicks may vary in length, I prefer t/'ohave them extend out'about a quar ter inch into the artally oil-filled hollow interir of the shaft.

The invention may be used to lubricate and poses, if 3() I claimas my invention 1. A tubularv shaft provided with a fing aperture and closing means '1herefor, a-` ick tube extending diametrically-nearly acrosse ery, e other end ,being within such tubular shaft, in combination with another vparallel Wick tube similarly conditioned but reversely arranged.

2. Av tubular shaft provided with a filling 40 aperture and closing means therefor, a Wick of June 1907.

E. L. WOOD Witnesses:

THOMAS DREW STETsoN, HELEN A.'CLAUT1CE.

olpening at one end through the peripht f, 

